Here's Milk, ho! - Cries of New York, 1808

"This choice and wholesome liquid is ... carried round, twice a day in summer and once in winter, from door to door, in this manner, in large tin kettles, some of which hold more than twelve gallons each. It is brought over Brooklyn ferry in great quantities, some of it from several miles up the island. Those who keep cows in the outskirts of the city drive round with it in carts, which are mostly covered. It sells from six to ten cents per quart."

The Cries of New-York. New-York: Printed and sold by S. Wood, at the Juvenile Book-store, No. 362, Pearl-Street, 1808